Return related error code with ManagerError

For error handler to decide the exact error type,
related error code is needed. The field will be empty
list if there is not related error

Issue: #

Change-Id: I53ad9e6da41ab65ea96414753635576c64d5d6d0

vmware_nsxlib/v3/exceptions.py

@@ -70,6 +70,7 @@ class NsxLibInvalidInput(NsxLibException):
 class ManagerError(NsxLibException):
     message = _("Unexpected error from backend manager (%(manager)s) "
                 "for %(operation)s%(details)s")
+    related_error_codes = []
 
     def __init__(self, **kwargs):
         details = kwargs.get('details', '')
@@ -80,6 +81,7 @@ class ManagerError(NsxLibException):
         except KeyError:
             self.msg = details
         self.error_code = kwargs.get('error_code')
+        self.related_error_codes = kwargs.get('related_error_codes', [])
 
 
 class ResourceNotFound(ManagerError):